Percussive tool.



Pez/tentati Deo. 9, 1913.

n l. r 'PERSUSSIVE-TOOL.

Mmmm-10N FILED PEB. 1912.

' fluid. feeding COMPANY, QF NEW YORK, 2N. Y., COBQEATION 0F vNEW JERSEY.

rnncnssivn Toor..

Sp-ecication of. Letters Iatent.

Patenten nee. a, 1ers.

appneaner area February 3,1912. seria-1 no. tratase.

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citizen of the/UnitedStates, and;` resident.`

of Easton, in the county of Northampton and State of .Pennsylvania,have invented a new and useful Improvement in Percussive Tools, of which the following is a speciication.

The objects of t is inventionvare to provide a novel rotation` device for a tool steel,

and a novel arrangement. for feeding the motive fluid to the steel.

' In the accompanying drawingaFigure 1 shows in longitudinal central section a percussive tool of the piston hammer type with rn improved rotation device and motive device for the tool steel applied thereto, and Fig. 2 is a detail cross section through the rotation device.

.The workpiston is denoted by 1 and the chamberA in which it reciprocates is denoted by 2. The rotationl piston is denoted by 3 and-the chamber within which it reciprocates is denoted by 4. The tool cylinder 5 is provided with a handle 6 and a front head7. The valve chest seat 8 on the cylinder 5, has the usual motive fluid passages 9 and 10 leading to the opposite ends of the.

work piston chamber 2 and the usual exhaust passage 11. The main controlling valve, not shown, may be of any well known or approved construction. A bushing 12 is located within the cylinder 5, at the front end of the work piston chamber 2, which bushing may be keyed as at 13, to the cylin der to prevent the bushing from turning therein. The anvil block 14 is fitted to turn and have a limited sliding movement within the bushing 12. This anvil block has a motive fluid passage 15 therein, leading from its side to its front end. This passage 15 is always in communication with an annular chamber 16, which chamber is shown in the present instance as being located in the inner Wall of the bushing 12. This chamber 16 has a port 17 which is in open communication with a motive fluid p ssage 18 leading to the valve chest seat 8, which passage is independent of the passages leadingy from .the valve seat to the work piston chamber 2. A chuck 19 is rotatably mount-- ed inthe Jfront head 7 of the tool, which chuck is adapted to receive the shank of the hollow drill steel 20, the bore of Which steel is at all times in open communication with the passage 15, in the anvilbloclr 14. This chuck 19 is provided with a spur gear 21 which meshes with a pinion 22 in axial alinement with the longitudinally reciprocating rotation piston 3. This rotation piston 3 has a sliding intcrlocked engagement with the pinion 22, in the present instance, by providing'the piston with a front extension 23, angular in cross section, fitted to reciprocate in the bore 24 ot' the pinion 29., its bore. being of the saine cross sectional shape as the extension 23. The movement of this rotation piston is under the same control as the work piston 1, by brin gingv the `front and -back ends oi' the rotatiop piston chamber 4 into open communication with the front and back ends of the work piston chamber 2, through ports 25, 26. A step by step rotary movement in one direction is imparted to the rotation piston 3, by means of a rifle bar 27, with which the piston has' an interlocked sliding engagement, said rifle bar being arranged to be clutched to and released from the cylinder by a ratchet device 28 of any well known or appr/ved construction. y

By locating the rotation piston' along the side of the work piston, the length of the tool is materially decreased and the tool is made more compact. It will also be seen that by providing an independent motive supply passage for the supply of motive fluid to the hollow drill steel through the anvil block, the operation ot `the work piston is not affected' by said supply and a very simple and eiiicient arrangement is provided.

While I have shown this invention as applied to a percussive tool of the piston hammer type, it is to wish to limit myself to such particular type of tool, but contemplate the use of my invention wherever applicable in percussive tools. i

What I claim` is:

1. In a percussive tool, a work piston, a rotation piston arranged along they side of be understood that I do notl the same and parallel therewith, their cham?v bers and a chuck rotated from the'rotation piston.

2. In a percussivetool, a. work piston, a rotation piston, their chambers, a chuck,

rotation piston arranged along the sident' the same and parallel therewith, their chambers, al chuck and a pinion geared.

thereto, *said pinion being in axial alinementwitlr and rotated by the rotation pis- Iton. 1`

44l.V In a percussive tool, a work piston ,and a rotation piston arranged alongthe side of the same and parallel there yvith, both being under the same motive fluid control and a chuck rotated by the rotation piston.l

5.. In a percussive tool, a work piston .and arotation piston both beiner under the'same motive fluid control, their and a pinion geared thereto, said pinion being in axial alinernent with and rotated by the rotation piston.

6. In a percussive tool, ay Work piston and a rotation piston arranged lalong the sideA of the same and parallel therewith, both pistons being under the same motive. fluid control, their chambers, a chuck and a pinion geared thereto, said pinion being in axial alinement withI and rotated by the rotation piston. l

7. In a percussive tool, a cylinder, al Work piston, a chuck, a p inion'geared thereto, a rifle bar arranged to be clutched to and released from the cylinder and a rotation piston having a sliding interlocked engagement With said rilie bar and pinion for imparting 'a rotary movement to the chuck.

8. In a percussive tool, a cylinder, a Work piston, a chuck, a pinion geared thereto, a rifle bar arranged to be clutched to and released from the cylinder, and a rotation piston having a sliding interlocked engagement with said rifle bar and pinion for imparting a rotary movement to the chuck, .said Workplston and rotation piston being under the same motive fluid control.

9. In a percussive tool, a cylinder, a Work piston, a chuck, a pinion geared thereto, a rie bar arranged to be clutched to' and released4 from the cylinder and a rotation chambers, av chuckpiston having a sliding'jinterlocked engagement With-the rifle bar and provided with an extension having' a sliding interlockti engagement With said pinion for imparting.

a rotary movement to the chuck.

10. In a percussive tool, a cylinder, a work piston, a chuck, a pinion geared thereto, a rifle bar arranged to be clutched to and released from the cylinder and a rotation. pislton having a sliding interlocked engage-v ment With the rie bar and provided with an extension having a sliding interlocked engagement with said pinion for imparting l2. In a percussive tool, a Work piston, a

chuck, a rotation piston arranged along the side of said Werk piston and means including a rifle bar engaged by said rotation piston for rotating said chuck.

13. In a percussive tool, a work piston, a

chuck, al rotation piston arranged along the side of said Work piston and means including a rifle bar for rotating said chuck from said rotation piston.

In testimony that vI claim the foregoing as my invention, -I have signed my name in presence of two witnesses, this first day or' February 1912.

l LEWIS o. BAYLES.

Witnesses: y l

F. GEORGE BARRY,

C. S. SUNDGREN.' 

